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If measure angle A and measure angle B and measure angle b is 60degree and measure angle A and B are linear pair then find measure angle aA



If measure of ∠B=60°
Then, ∠A+∠B=180° (Linear pair)
      ⇒ ∠A+60°=180°
      ⇒ ∠A=180°-60°
      ⇒ ∠A=120°
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